@article{JOLT_1994_4_1_a4,
     author = {D. Arnal and J. Ludwig},
     title = { Sums of {Adjoint} {Orbits}},
     journal = {Journal of Lie Theory},
     pages = {105--138},
     year = {1994},
     volume = {4},
     number = {1},
     zbl = {0823.22010},
     url = {http://geodesic.mathdoc.fr/item/JOLT_1994_4_1_a4/}
}